How to select railway line properly is a key problem needed to the solved urgently in new railway construction according to engineering geological condition.
对新建铁路，如何根据工程地质条件选择经济、合理的铁路线路是新建铁路迫切需要解决的问题。
The failure progress of geological material is a key scientific problem in the engineering of geological hazard and control, and is also a frontal problem in mechanics.
地质体材料的破坏演化过程是地质灾害防治工程中亟待解决的关键科学问题，也是力学的前沿课题。
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